Awriter can write 10 pages every 20
minutes. at this rate, write an expression that
states how many pages this writer write per
hour.

30×

Step-by-step explanation:

if a writer can write 10 pages every 20 mins then that means a writer can write 30 pages every hour. there is 60 mins in every hour so if you do 60 divided by 20 you get three. then you do 10 times three and get thirty.

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this